add Psr Logger
add Monolog
added loging of debug information
updated composer.lock
removed some logs
removed some logs
changed log messages, enable import command
make argument optional for grep command
build inifile if not given
test file for grep command
fixed error in test
fixed fatal error
fixed logger
fixed error
fixed error
fixed error
changed output
optimized inputs
update from the master branch
update from the master branch